I'll second the vote for Mac. I've used both PC and Mac, I'm not going to say one is better than the other, but I definitely prefer Macs, especially with OSX. I use a 867 Mhz powebook G4 to handle lots of raw processing of images from a Canon 10D camera for magazine publication. I works great, wireless internet is great, itunes is awesome, even with my small 12" screen I have no complaints plus I can take it with me everywhere if I want to. They now make iBooks with the G4 processor that are faster than my machine and still quite affordable. Do max out the RAM if you can and if you plan on shooting alot, plan for a back up or storage system (DVD burner or firewire hardrives). I have 60GB in my book (almost filled up) plus a 120, 80, and 60 GB external hard drives, and in addition to that I am looking into buying a pair of 200 GB hard drives for a mirrored RAID setup.